So say someone smash and grabs the 4.20 keys would that work as a master key for the lower firmwares or do you need each set of keys to match up to the respective software?

You would need each set of keys. Higher firmwares would include the older keys, so presumably if you got 4.20 keys, then you could get the others by the same method. Of course that assumes the keys were extracted from the PS3 firmware itself.

This is good news indeed! Finally the scene is pushing past the dongles, I was wondering when it would start moving again. Currently 3.60 has no games I am interested in backing up, so I'll keep waiting until some of the later games are covered by newer keys.

Just a head's up, i tried updating infamous 2 to the latest update which is still 3.6, but it doesn't work. Well, not after my extensive testing and someone else saying they had the same problem as me (but had other games work).

I hope that game works updated... i have been craving move support for so long, especially after seeing how awesome it was with Festival of Blood.

So say someone smash and grabs the 4.20 keys would that work as a master key for the lower firmwares or do you need each set of keys to match up to the respective software?

4.20 keys mean you could decrypt the 4.20 encrypted EBOOT.BIN to work on lower firmware (3.55), you need 3.72 keys to decrypt 3.72 EBOOT.BIN's... and so on.. so yes you would need keys for every firmware version.

This means that someone will have to find out how to make Cfw that high. But who knows maybe it would be worth it to go that high. People have to remember that the higher in the firmware you go the more Sony put into stopping all we try to do. So it will take a lot of work.

From what I understand that you can't downgrade past your firmware the ps3 was flashed with from the factory. It doesn't matter if we have the keys or not. Correct me if I am wrong. Thanks